This is sort of true. Buddhism was founded by Siddhartha Gautama, who was a prince, but then basically abdicated at 29, meaning he relinquished his power, no longer making him a prince.
Yes
Siddhartha Gautama is referenced by a number of different titles, but mostly as Buddha. Sometimes he is referred to as Sakyamuni Buddha where Sakyamuni (Sage of the Sakyas) is a refernce to the tribe he was born into (Sakya) or at times he is called Gautama Buddha, as you indicated, where Gautama is his family name. Both of these are used when referring to the actual historical person of Siddhartha Gautama as opposed to another enlighten person who has attained Buddhahood (who would be called a Buddha also).
There is no true founder of ethics, but a few famous philosophers that you could call founders of ethics are Confucius, The Buddha (Siddhartha Gautama), and Laozi... these are only 3 famous philosophers out of many others!
The history of buddhism started in 580 BC, when prince Siddhartha Gautama was born. He left his palace to find true happiness and enlightenment. He shared his knowledge with many others, starting buddhism.
What you said is not true. In Hinduism and its various sectors, there are many female godesses. In the religions you refered to, there were probably male chauvinists who founded the religions.
It is not true that Hinduism is based on four major principles. It is based on 9 peinciples and its beliefs.
No.
true
Defeat is not a term used in discussions about interactions with the Buddha. Hr engaged in no arm wrestling, feats of strength, or poetry competitions. Even the Dharma duelling used in Zen Buddhism where scholars debate points of Buddhist philosophy was not yet developed. When he was still Prince Siddhartha Gautama he may have engaged in competitions and may well have won many of them, but in societies where princes exist nobody defeats them often - just as a matter of courtesy.
contemplation and meditation
False